make-manifold

[elalish]

Fixes #422

This introduces a tool to upload a GLB and download a manifold GLB with the new extension if it's possible to make the mesh water-tight. I'm running into some OOM problems with certain models, so there are probably some bugs to work out before this can be merged.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (58fb7e3) 89.73% compared to head (b28b2ab) 89.74%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #428   +/-   ##
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  Coverage   89.73%   89.74%           
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  Files          35       35           
  Lines        4200     4201    +1     
=======================================
+ Hits         3769     3770    +1     
  Misses        431      431           

see 1 file with indirect coverage changes

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[elalish]

Okay, there are definitely still some bugs, but this little test pages works reasonable well now. It'll be public at https://manifoldcad.org/make-manifold.html when this is merged. Don't get your hopes up though, most glTFs, even if they look fairly solid, are not actually manifold, nor even close enough for us to merge them automatically.

The worst bug I see now is some complex scenes like the Khronos Buggy and Dragon throw an OOM somewhere in the WASM. I'm guessing this is an error in the Merge function, but we can deal with that in a further PR.